Re: RAC private network IP's - 169.254.x.x
- From: "Radoulov, Dimitre" <cichomitiko@xxxxxxxxx>
- To: "krishna.setwin@xxxxxxxxx" <krishna.setwin@xxxxxxxxx>
- Date: Fri, 06 Apr 2012 10:16:55 +0200
Just to add that I noticed that the subnet 169.254.*.* will be used
even if you define a single interface for the interconnect.
Dimitre
On 06/04/2012 10:10, Radoulov, Dimitre wrote:
>
> as already stated, the 169.254.*.* is used by GI automatically:
>
> 11gR2 Grid Infrastructure Redundant Interconnect and
> ora.cluster_interconnect.haip [ID 1210883.1]
>
> Grid automatically picks free link local addresses from reserved
> 169.254.*.* subnet for HAIP. According to RFC-3927, link local subnet
> 169.254.*.* should not be used for any other purpose. With HAIP, by
> default, interconnect traffic will be load balanced across all active
> interconnect interfaces, and corresponding HAIP address will be failed
> over transparently to other adapters if one fails or becomes
> non-communicative. .
>
>
> On 06/04/2012 09:57, D'Hooge Freek wrote:
>> I think the 169.254.0.0/16 subnet is used for autoconfiguration ip addresses.
>> Which are addresses that are self assigned after verifying that no one else
>> is using it by sending out an arp ping (for instance, in case when the dhcp
>> server is not giving out an address).
>>
>> You should not use them when statistically assigning an ip address.
>>
>> Oracle is using ip addresses in this range for the private network as part
>> of the high available ip address (HAIP) functionality (which is also the
>> reason multicast's must be allowed between the different nodes).
>>
> [...]
>> Can we use 169.254.1.11& 169.254.1.12 as private IP's for RAC 2 node
>> cluster?
>> (basically any 169.254.x.x )
>>
>> we just have 1 private NIC for each node.
>>
>> version: 11.2.0.3 rac
>> RHEL 5.8
>>
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